IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

摘要

The present invention is an image processing apparatus for processing an input frame image, and a contrast analysis unit (13) generates a histogram of the input frame image and calculates the contrast from the histogram. A motion detection threshold setting unit (12) calculates an upper limit threshold and lower limit threshold for motion detection thresholds by using the calculated contrast and a motion detection level set through an input operation. When an interframe difference is greater than the upper limit threshold, a motion detection unit (14) determines that the pixels of interest are moving significantly and sets a combination ratio (K) to prevent the previous frame image from being combined. When the difference is less than the lower limit threshold, the motion detection unit (14) determines that the pixels of interest remain still and sets the combination ratio (K) to combine the previous frame image at the maximum ratio. When the difference is not greater than the upper limit threshold and not less than the lower limit threshold, the motion detection unit (14) sets the combination ratio so that the previous frame image is combined with the input frame image at a ratio based on the motion of the pixels of interest.